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Authors
Nivukoski, Ulla
Niemelä, Markus
Bloigu, Aini
Bloigu, Risto
Aalto, Mauri
Laatikainen, Tiina
Niemelä, Onni
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Funding
Funding for this research was provided by:
Tampereen Yliopisto (5300/3116)
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Article History
Received: 12 December 2019
Accepted: 5 April 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The investigation was performed with the understanding and written informed consent of each individual and was approved by the Coordinating Ethics Committee of the Helsinki and Uusimaa Hospital District. All surveys were conducted in accordance with the Declaration of Helsinki according to the ethical rules of the National Public Health Institute.
: Not applicable.
: The authors declare that they have no competing interests.
